Watch List notes:

World Medals, Italy, Vatican, Pius V (1504-1566-1572), Antonio Michele Ghislieri, restrike bronze medal, 1571, year V, by Giovanni Antonio de' Rossi, tonsured half-length bust r., at prayer, wearing embroidered robes, PIVS V. PONTIFEX MAXIMVS - AN V, rev. the two fleets in line against each other, the shores of Lepanto beyond, A DOMINO FACTVM EST ISTVD 1571, 40.5mm. (Modesti 620), extremely fine
The Holy League had been formed in 1570 to be a force against Suleiman II of Turkey and in 1571 their combined navies, led by Don John of Austria, defeated him at the Battle of Lepanto.